UPDATE 8 p.m. -- Eastbound lanes of I-90 are open again. Chains are required on all vehicles except all-wheel or four-wheel drive.

UPDATE: 6:04 p.m. -- WSDOT issued the following update: "There is compact snow, slush and ice on the roadway. Eastbound I-90 remains closed at milepost 45 near Bandera due to spinouts and a jackknifed semis. Update to estimated opening time for I-90 eastbound is now 8 p.m. as crews continue to clear spinouts and stalled vehicles between the summit and Easton."

UPDATE: 1:05 p.m. -- The state Department of Transportation closed eastbound lanes of Interstate 90 over Snoqualmie Pass for the third time Thursday around 1 p.m., and a spokesperson confirmed earlier that as snow continues to fall, more closures were possible.

The closure was west of the summit at milepost 45, near Bandera.

Washington State Patrol remained on the highway monitoring traffic and enforcing a chain requirement in place from the Washington State Department of Transportation (WSDOT) on all vehicles except those with all-wheel drive, according to a tweet from WSDOT.

WSDOT tweeted just before the 11:45 a.m. reopening that 10.6 inches of snow had fallen at the pass already Thursday, with more forecast throughout the day.

The pass first closed just after 7 a.m., then reopened by 8:30 a.m. With continued snow in the forecast, more closures are possible throughout the day.

Chains had already been required for traffic headed over the pass, save for vehicles equipped with all-wheel drive.

Snow was expected to fall heavily up and down the Cascade range Thursday, with a winter storm warning from the National Weather Service calling for upwards of 2 feet or more in places.

To the north, Stevens Pass on U.S. 2 was also getting blanketed under a heavy fall of snow, with more on the way. WSDOT had a traction tire requirement in place for travel over Stevens Pass as of Thursday morning.

WSDOT also had a traction tire requirement in place for travel on U.S. 12 over White Pass.

Drivers planning on traveling over a mountain pass under these conditions should plan ahead and stock their vehicle with a full tank of fuel, warm clothes, food, water, chains, jumper cables and flares, WSDOT advised. For more information about winter driving and preparations, go to WSDOT's winter driving page.